Improvement in burnishing-machines



UNITED STATES PATENT OFFICE.

ALBERT M. VIITE, OF HARTFORD, ASSIGNOR TO ROGERS & BROTHER, OF

VATERBURY, AND HARTFORD MANUFACTURING COMPANY, OF HART- FORD, CONNECTICUT.

IMPROVEMENT IN BURNlSHlNG-MACHINES.

Speeitieatnu forming part oi' Leiters Patent No. 3 01707. dated November 20,1S6U.

figures.

The nature of this improvement in burnishing-machines consists, iirst, in making a revolving cylindrical head and securing it upon a shaft in a proper manner, substantially as shown in the drawings, and arranging a series ofyielding pressureburnishers; and, second, in combination therewith, arranging a sliding holder-stock made in a proper manner, so as to present the surface of the work to' be burnished (held by said sliding holder-stock) in a proper manner to the action of the burnishers,

and being more especially adapted for burnishing concave and convexxsurfaces.

In the accompanying drawings is shown a side and partly-sectional view of my improvement.

n is the bead of the machine, upon which all of the mechanism constituting the machine is arranged and secured for operation.

m are the studs or hangers in. or to which the shaft r is secured in bearings suitably pre,- pared for holding, so as to allow it (the shaft r) freely and easily yet steadily to revolve therein. x y

ais the cylindrical burnisherhead, (see a and a', part sectionah) one end thereof made open to allow the work `being burnished to pass in and out of the said 'head without obstruction, and the other end having afhead, by means which it (the burnisher-head) is secued tothe outer .end of the sha; 1'.v Near theouter and open end of the head a, I enlarge or through the thickness oftheenlarged portion in divergiug lines from the center or axis of- 1: lotion, for the purpose of receiving and holdbuild up hubs and form apertures' ing a series of burnishers, p. Said burnishers are made with a shoulder to support and hold them in place in readiness for action. lt will bc readily seen that the forni and shape "oi both the head a and the burnishcr` p may be variedjn shape and proportion without changiugthe effect produced thereby.

b is an elastic band, secured in any proper manner over the ends of the burnishers, and

by the use of which au elastic pressure is produced to the buruishers j while the burnishing is being performed from the inside of the head, as shown in the drawings. Atthe same time it will be obvious that the same effect may be produced by .simply changing .the burnishers and inserting them into the aperture from the inside, and securing them in place, in readiness for "action, by means ot' elastic or metallic band or springs, while `the outer ends do the burnishing. Thus the burnishers protruding outward buruish Vcone-ave surfaces, while the burnishers protruding' inward burnish convex surfaces.

disaburnishholder stock,sec uredtoabevel edge sliding bedpiece, g, which is also secured between two ways in such a manner as to allow of its moving freely and easily back and forth.

sis a feed-screw, secured in a stud or box, h, in a proper manner, so as to prevent shuck or backlash.

n is a pulley secured on the end of the screw spindle s, just outside of the stud or box h, and is driven by a belt, o, frointhe shaft r.

l j is a stud secured in the sliding bed-piece i into which is secured a nut made in two The lower half, i, is fitted in a fixed position. The upper half is had to its place by springs. The object of this arrangement is to allow the upper half, i', of the nut to be lifted so as to allow' the stock d to be moved quickly out or in, and at once replace the nut i' in readiness to be niove'd forward or backward, as desired, by the said screw.

e is a fixed stand or post, secured in the bed g1 parts, 'i and z.

u Justback of and nearly at the side of .the

stock when it (the stock d) is at rest, in 'or to which. (the stand e) is made or secured a caniorjpattern, either as shown'atfor in any ,other form or shape desirable, to produce the result of so guiding thehold'er 0,011 which the work is designed to be secured, in any of the ordinary Ways, so that it will present the Work thus secured, to be burnished in a proper n'ian- -ner, to the action of f the burnishcrs.

holden@ (for its shape see Figure 2) is made on the front end thereof the proper shape tol receive the spoon'or other article to be burnished, and is-to be secured thereto (the spoon) by any of the ordinary ways. The enlarged or flattened portion of the holder, just back; of the form to rccei ve the bowl of a spoon, is secured to the stud d by a pin or bolt, t. It also, has a shank, q, 'extending back from the bolt or pin t. ASaid shank is made in two parts, (see Fig. 2,) one of which is hinged tothe other by a" pin or bolt, b, and nearly in the center thereof is provided a slit, through Whicha pin, w,

.extends from the main shank, thus allowing the jointed ,portion slightly to resist the action of thespring :C downward, and to firmly retain its. position with themain shank by the pin win its upward motionl ln the end of the said jointed portion ofthe shank is secured a guide-pin, y., and moves against ,the cam o'r y pattern f, While the stud d is moving forward by the action of the screw s, toV present the Work to the action of the burnisliers; and when thevvping( reaches; the forward end of the earn or patternf; it (the pin `yxvith the shank) is lifted by the.. actionv of the springaover the end of the carn'or pattern, thus-lowering'the l burnished end of the Work away from the burnishers, and allowing. the stock with the Workto be drawn back to the starting-point while the burnishinghead is still revolving.

- It will be obvious that the size, shape, and

.proportions of the several parts may be. changed, so as to adapt it to the different kinds and shaped articles, without changing the characteristic features of the nriaehine.l Iiee-` lieve I 'have th'us shown the construction, the mode of its operation, and therebyalsoshow-n the advantage to be derivedby it* ov erlothers,'

present the su'rface'to be burnished to the ends of a series of burnishers arranged therein, substantially as and for the purpose described.'

2. The arrangement of the sliding sto'ck d,"

holder c, vearn or pattern f, in combination with the head a, substantially as and for vvthe purpose described. I

In testimony-whereof I have. hereunto set my hand, and seal this 28th-day of September.

1860. i v v.

y la, M. WHITE. [L s.]- Witnesses: ,c

DAVID F. RANDALL, JEREMYXRQ BLISS; 

